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QUESTION:
Assume that the number of curve balls a pitcher throws follows a Binomial model and that there is a 30% chance that the pitcher throws a curve ball.
1. What is the expected number of curve balls the pitcher throws out of 10 pitches?
2. What is the standard deviation for the number of curve balls the pitcher throws out of 10 pitches?
3. What is the probability that the pitcher throws exactly 2 curve balls out of 10 pitches?
4. What is the probability that a pitcher throws no curve balls out of 15 pitches?
5. What is the probability that the pitcher throws at least 2 curve balls out of 15 pitches?
6. What is the probability that a pitcher throws at least 13 curve balls out of 15 pitches?
A food inspector, examining 12 jars of a certain brand of peanut butter, obtained the following percentages of impurities: 2.3, 1.9, 2.1, 2.8, 2.3, 3.6, 1.4, 1.8, 2.1, 3.2, 2.0, and 1.9. Based on the modification of Theorem 1 of Exercise 7, what c..
the probability distribution of a discrete random variable x is given bypx -1 15 px 0 25 px 1 25 .a. compute
They conduct a survey of 100 clients which yields an average age of 32 years with a standard deviation of seven years. Determine a 98% confidence interval.
A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and a = 0.01. What are the critical values?
No one has ever proved that the human fetus is not a person with rights. Therefore, abortion is morally wrong.
In a speech during her campaign for reelection, a Republican candidate claims that 55% of regis- tered Democrats in her county intend to vote for her.
a. Assuming that an item has a aw, what is the probability that it is detected by the end of the second xation (once a aw has been detected, the sequence of xations terminates)? b. Give an expression for the probability that a aw will be detecte..
A West Coast university has found that about 90% of its accepted applicants for enrollment in the freshman class will actually enroll. In 2007, 1360 applicants were accepted to the university. Within what limits would you expect to find the size o..
in a sanitary landfill ch4 methane is to be collected as a by-product. two flows of methane mix adiabatically on a
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
Show that this is enough to allow us to calculate the probability that a ball drawn at random from the urn will be white. What is this probability?
q1. a researcher is interested in comparing the effectiveness of three different kinds of therapy for anger problems.
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